I know for a fact PCUSA had a section of its candidates and cadre go full terf and formed a faction to try and change the party leadership and constitution into an anti-lgbtq+ formation.

They got purged, were salty they lost, tried to form their own "true pcusa" after stealing several party accounts, and now mainly spend their time trying to smear the party saying it's, somehow, a drug smuggling organization that runs brothels out of Staten Island N.Y and Vermont.

I'll also add on that many of the party lower and upper leadership are LGBTQ+, and enjoy building the party. The only reason that I've seen LGBTQ+ people leave the party is for the same reasons Cis-het people leave: Ideology. They join the party either thinking it's one thing, or with the concept of being the one true leftist with the plan to lead the revolution, then grow disillusioned with the fact that party was not what they were looking for. I'll simply say that if you're joining a party, do your research! Read their constitution, ideological documents, listen to some of their media, see if it's in line with your own or if you're willing to enter and align yourself with the Bolshevik ideology.